Frequency Calculations

WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.

Calculating Tire and Wheel Frequency

For a vibration concern, use the vehicle speed to determine tire/wheel frequency and RPM. Calculate the tire and wheel RPM and frequency by carrying out and following:

Measure the diameter of the tire.
Record the speed at which the vibration occurs.
Obtain the corresponding tire and wheel RPM and frequency from the Tire Speed and Frequency Chart.
- If the vehicle speed is not listed, divide the vehicle speed at which the vibration occurs by 16 km/h (10 mph). Multiply that number by the 16 km/h (10 mph) tire RPM listed for that tire diameter in the chart. Then divide that number by 60. For example: a 40 MPH (Miles Per Hour) vibration with 835 mm (33 in) tires. 40 divided by 10 = 4. Multiply 4 by 105 = 420 RPM. Divide 420 RPM by 60 seconds = 7 Hertz (Hz) at 40 MPH (Miles Per Hour).